Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Boundary integrals"”.
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Plane -Wave Time -Domain Algorithms for Efficient Analysis of Three-Dimensional Transient Wave Phenomena
… call for the evaluation of retarded-time boundary integrals (RTBIs) as these boundary integrals play a fundamental role in formulation of the integral equation-based numerical techniques and in imposing exact radiation boundary conditions used in differential equation-based methods. …
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Método dos Elementos de Contorno para elasticidade linear bidimensional
… and using Kelvin's fundamental solution, a boundary integral equation is obtained, which is discretized, for computational implementation, using isoparametric linear elements. Applying the discretized integral equation at the boundary nodal points, a system of linear equations is obtained, …
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A Numerical Scheme for Mullins-Sekerka Flow in Three Space Dimensions
… as one on the two-dimensional interface by using boundary integrals.</p> <p>A semi-implicit scheme to solve the free boundary problem numerically is implemented. Numerical analysis tasks include discretizing surfaces, overcoming node bunching, and dealing with topology change in a toroidal …
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Uma formulação de elementos de contorno para análise de vibrações livres
… work presents an alternative formulation for the boundary element analysis of free vibrations of elastic bodies in plane stress or plane strain. The main characteristic of this method is the transformation of the inertial domain integral into equivalent boundary integrals, by employing special …
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Complex boundary integral techniques for turbomachinery blading
… problems. The equations are in terms of the boundary values of the derivatives of the harmonic function sought. The equations are derived using the complex variables forms of Green’s theorem. They are solved numerically using low order complex polynomial approximations. The solution of …
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Direct Waveform Inversion Using Explicit Time-Space Causality Principle
… stops when the reflection traveltime from the boundary of the inverted model is beyond the finite recording time in seismic data. The DWI must use the full seismic wavefield, including internal and free-surface multiples, and it combines seismic migration and velocity model inversion into one …
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Three-dimensional layerwise modeling of layered media with boundary integral equations
… layer, which are applied in the two-dimensional boundary integral equation model to produce the integral representation of the solution. The boundary integral equation model is two-dimensional, displacement-based and assumes piecewise continuous distribution of the displacement components through …
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Simulating breaking waves using smoothed particle hydrodynamics
… of kernels employed, including the "missing boundary integrals", and ensuring consistency) while still enforcing the fundamental principles.
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Numerical Methods for Simulating Fluid Motion Driven By Immersed Interface
… method. One is for accurately evaluating boundary integral solutions at a point, and the other is for computing Stokes solution values on a rectangular mesh. We first describe a method for computing singular or nearly singular integrals, evaluated at a point on or near the curve. To …
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Modelling and inference in active systems
… Here, we present a solution of the direct boundary integral equation for the traction on spherical active particles interacting with each other and their surroundings. For a single particle away from any boundaries this solution is exact, as both single- and double-layer integral operators …